The Protestant church of Aldtsjerk or Saint Paul's church[1] is a religious building in Aldtsjerk, Netherlands, one of the numerous medieval churches in Friesland.

It is a mid 12th century Romanesque church with a triple closed choir built out of brick covered with tuffstone,[1] located on the Van Sminiawei 29.

[2] The tower dates from the 13th century and is like the church build out of brick covered with tuffstone.

[1] The church was once a Roman Catholic church dedicated to Saint Paul but became a Protestant church after the Protestant reformation.

[1] It is listed as a Rijksmonument, number 35669.